Could my crush have DID?

I apologize for my ignorance and lengthy post

I met a guy towards the end of October, and we immediately had amazing chemistry and connection. We spent an entire evening and night together with a mutual friend at an event. Since then, we've texted each other occasionally on Instagram, but nothing serious has developed. A week ago he needed to borrow a phone and I had it so we arranged to meet on Sunday (22nd) but on Saturday night (21) he randomly invited me to go out with him and his friends. It seemed strange to me because he insisted so much and we didn't even know each other well. However, for me it was a beautiful night, his friends were fantastic and he treated me all evening as if my happiness was his life mission. He was a little tipsy and revealed to me that he had a crush on me since day 1 (end of October, now we are at the end of March) but that he tried to repress it for all this time due to paranoia and fear of rejection. However, I reciprocated and we started dating and everything went pretty well so I was very happy, it also happened that he fell asleep on me at my house on Sunday and he told me that it was a scientific thing because I had a calm aura and he felt calm and safe enough to sleep on me. He always treated me better than I could ask for. Then we started having the first clashes which were mainly based on misunderstandings and unfortunately, I also had a crisis but I was pretty sure we had cleared things up, and everything came back to normal.

We were supposed to see each other on this Sunday (today) and until I think Thursday morning everything seemed okay then on Thursday evening he wrote me some messages in which he seemed to want to give up everything but he is half American and I am not so i didn't quite understand everything at first and I asked him to talk about it in person, and he agreed. We met on this Friday evening, and he explained everything to me. I don't want to gaslight, just want to figure out why he literally told me the opposite of the story he told me when we started dating. Like he doesn't have a crush on me and for all this time, he was forcing his feelings and also he didn't feel like he was free to be himself with me and I was like Why lie in the first place. I literally never asked anything from him. For all these days he kept forgetting basic things about me (even like that I smoke cigarettes -he also smoked with me- or what I like or don't like). And above all, he keeps thinking that he met me at an event I've never been to. I told him how it really went and then he seemed to remember. Then he forgets again. and so on with a lot of things about me. I managed to reassure him about some of his paranoia and resolve some of the issues he reported to me. He decided that being friends was fine for him (up until 2 seconds before he wanted to give up everything). I made sure he was sure a couple of times and he was, we also talked about new boundaries. He completely changed his behavior, he seemed calm again and even his body language seemed the same as when he was flirting with me. He wanted physical contact again. In the beginning of the conversation, he also told me that sometimes he doesn't recognize me but it could be because we don't know each other well. I didn't think he had a personality disorder or dissociation until someone who has it and knows other people who have it told me it might be. He's very traumatized and he makes me very confused, so I feel like I'm doing the job for both of us, I feel it's worth it and I really like him every way. I swear he literally changes his behavior and the way he speaks and looks at me and his body language from one moment to the next and this thing that He forgets many things about me even if I repeat them every time and confuses our meeting. Now for me is Sunday morning and he told me he needed a day for himself because of how much he is working but in chat, now it looks like nothing happened. Everything is like before. It makes me think. However, he has some information that he holds on to as if it were pillars and he can remember and follow them. I'm trying to understand the patterns in the chat too. Sometimes he uses a certain adjective to describe me and when he "switches", nope. Same thing with emojis and writing style. I don't know. I hope I don't sound stupid, it's not an accusation or something I am not judging and I don't think it is a bad thing etc I'm just trying to understand why it's like he's constantly changing his mind, from one extreme to the other, forgetting things and acting or remembering like 2 different ways of the same life if that makes sense. Thank you for your time I hope you have a wonderful day and I am sorry for my long post also English is clearly not my first language.